Figure 5. Ectopic co-expression of ATG7 and ATG2B restores autophagy and diminishes miR-143-enhanced cytarabine cytotoxicity in HL60 cells. (A, B) HL60 cells were co-transfected 100 nM O/E miR-143 or 100 nM O/E Ctrl with pcDNA-vector or pcDNA-ATG7-IRES-ATG2B for 48 h in the presence of 500 nM cytarabine. The protein expression of ATG7, ATG2B, and LC-3 was measured by immunoblotting. β-actin was used as a loading control. The representative images (A) and statistical analysis of LC3-II/LC3-I (B) are shown. (C) HL60 cells were treated as in (A, B). Cell viability was analyzed by MTT assay. The results are expressed as relative to vehicle group (%). In (A, B), data are representative of 3 independent experiments. In (C), each symbol represents the value from 5 replicates. Data are mean ± SD and compared using Student t-test. **, P<0.01; NS, not significant.